Added first test

Author: ckunki

exasol/toolbox/nox/_artifacts.py

@@ -156,14 +156,14 @@ def _combine_coverage(session: Session, dir: Path, pattern: str):
     if args := [f for f in dir.glob(pattern) if f.exists()]:
         session.run("coverage", "combine", "--keep", *args)
     else:
-        print(f"Could not find any file {dir}/{pattern}")
+        print(f"Could not find any file {dir}/{pattern}", file=sys.stderr)
 
 
 def _copy_artifacts(dir: Path, *files: str):
     for file in files:
         path = dir / file
         if path.exists():
-            print(f"Copying file {path}")
+            print(f"Copying file {path}", file=sys.stderr)
             shutil.copy(path, ".")
         else:
-            print(f"File not found {path}")
+            print(f"File not found {path}", file=sys.stderr)

test/unit/artifacts_test.py

@@ -0,0 +1,37 @@
+import pytest
+import re
+from inspect import cleandoc
+from unittest.mock import Mock, patch
+from exasol.toolbox.nox._artifacts import copy_artifacts
+
+
+
+@pytest.fixture
+def python_version():
+    return "9.9"
+
+
+@pytest.fixture
+def project_config(python_version):
+    with patch("exasol.toolbox.nox._artifacts.PROJECT_CONFIG") as config:
+        config.python_versions = [python_version]
+        yield config
+
+
+def test_no_coverage(project_config, tmp_path, capsys):
+    session = Mock(posargs=[str(tmp_path)])
+    copy_artifacts(session)
+    captured = capsys.readouterr()
+    re.match(
+        cleandoc(
+            f"""
+            Could not find any file .*/coverage-python9.9\\*/.coverage
+            File not found .*/lint-python9.9/.lint.txt
+            File not found .*/lint-python9.9/.lint.json
+            File not found .*/security-python9.9/.security.json
+            """
+        ),
+        captured.err,
+    )
+    with capsys.disabled():
+        print(captured.err)